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Down Screening Tests
 
Down Screening Tests

Down’s syndrome is a genetic disorder where the affected person carries an extra chromosome 21 in each cell. People with Down’s syndrome have varying degrees of learning difficulty and a characteristic appearance. They may also have heart and lung problems. Down’s syndrome is sometimes called Trisomy 21. A variety of Down screening tests are available now that can be carried out in the first and/or second trimesters of pregnancy. These are based on either :

  Measuring the nuchal translucency, or
  Measuring the levels of naturally occurring pregnancy hormones in the mother’s blood.

If the results of a screening text show that there is a relatively high likelihood of the baby having Down’s syndrome, you will be offered a diagnostic test, such as chorionic villus sampling or amniocentisis, which will give you a definite answer.

 
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